Bobbin hoisting means of stranding and other machines



Dec. 26', 1944. LARMUTH 2,366,145

BOBBIN HOISTING MEANS OF STRANDING AND OTHER MACHINES Filed May 28, 1942 3 Sheets-Sheet l I I JvP/nim- I JO'IL/rz, Hamilton Lammulth pea: 5131104201.

V V .fllto'r'ne y Dec. 26, 1944.

J. H.'LARMUTH 2,366,145 BOBBIN HOISTING MEANS OF STRANDING AND OTHER MACHINES Filed May 28, 1942 3 Sheets-Sheet 2 [mentor John Ha/milfo'n, La'rmth pet YFmMA. 513mm EBOQLmAL v flltor'nwj.

Dec. 26, 1944.

J. H. LARMUTH 2,366,145 BOBBIN HOISTING MEANS OF STRANDING' AND OTHER MACHINES Filed May 28, 1942 s Sheets-Sheet 3 I'm/vendor JOh/IL HaJmiZILmz La/rmluih. p! fimahmmx sEmkandk UNITED STATE Patented Dec. 26, 1944 r HOISTING MEANS OF STRANDING y AND OTHER MACHINES R 1 John Hamilton Lamiuth, Upper'Colwyn Bay,

North Wales Application May 28; 1942, Serial No. 444,846 b b In Great Britain July 3, 1941 1 1 1 Claim. 11 101. 1s7 1 1 stand with its centralhole horizontal. 'I'he plat- 1 This invention relates to the bobbin hoisting means of stranding and other machines wherein 1 bobbins are hoisted into cradle journalled in a I rotary member. 1 1 b 1 y -.The object of the said invention is to provide a novel construction which is simpler and less 1 costly toproduce than previously known constructions and gives a perfectly vertical lift exactly between the sides of the cradle. 11 1 The bobbin hoisting. means of astranding or 3 other-machine in accordance with my invention comprises bobbin platforms situated vertically beneath the cradles andslidable on fixed vertical form 2 is mounted on and projects above a channel iron 3.Which is connected at eachend by a pivotal pin 4-;to a snatch block 5 each of which.

has a pair of lugs 6, one lug 6 of each pair being 1 situated vertically above the other. Each lug. 6

has in it a verticalhole which may beof elongated form. Theholes of each pair of lugs 6 is engaged b by a stationary vertical guide post I, there being therefore two guide posts'l' for eachaplatforml.

On each snatch block 5 there is a rotatably mounted snatch sprocket wheel 8 which lies at guide posts and means for lifting the platforms g-uide posts.

1 The means for lifting the platforms may com- 1 prise chains or cables which pass over chain wheels or pulleys provided on snatch blocks connected to the platforms andjcan be wound over chain wheels or onto and off a winding barrel to lift and lower the platforms so as to hoist the drums into or lower them out of the cradles from below.

A single sprocket wheel shaft or a single wind- 1 ing barrel maybe provided to operate each of two platforms separately.

A single pair of chains may be provided to operate each of two platformsseparately, each chain a being anchored at one end and the saidchains passing over idle wheels situated at a similar ele vation to the anchored ends of the chains, whilst the sprocket wheel shaft is mounted at a lower elevation and the chains engage sprocket wheels thereon. 1

I attain this object by the means illustrated in the accompanying drawings, wherein- Figure 1 is a fragmentary sideview, partly in is a front view thereof, partly in secalong a vertical path determined by the vertical T15 the bottom of a depending loop in a pivotal link chain indicated in Figure 1 by the dot-and-dash line 9 and meshing with the "sprocket-wheel 8.,

One end ofthe chain 9 is situated at the end of one. side of theloop andis anchored at"! to a member ll connected by bolts to each side member I2 of theframe of the stranding machine. The member H carriesanidle sprocket I3 over which the upper end of theother side of frame member 12. The chain 9 extends over-the 30 b the under side of ahoisting sprocket wheel I8 with which it meshes. extends upwards, then overanidle sprocket wheel 1 thechain loop passes. Each member II has a lug M by which the upper end of one post 1 1 is secured, the lower end of the 25.

two posts being secured to a stationary plate l5. 1

From the idle sprocket wheel 13 thechain 9 extends horizontally to an idle sprocket wheel I8 carried by a member I! secured by screws to the idle sprocket wheel-I 6 and then downwards over From thence the chain 9 l9,.then horizontally, then over an idle sprocket wheel 39, Figure 3, similar to the wheel I3, then downwards to form a loop engaged by the snatch sprocket wheel 40, which is similar to the sprocket wheel 8, and having thetop of oneof its sides anchoredto a third member also indicated by the reference numeral H in Figure 5 and similar but reversed tothe member I l which isscrewed to the Figure 3 is a detached diagrammatic side view drawn to a smaller scale and illustrating a dispo- Referringto the drawings, in the construction showntherein, as applied by way ofexample to the ho'isting'of'bobbins into two adjacent cradles 31 and 38 journalled in the rotary member I of 1 a stranding machine, I provide beneath each cradle a platform 2 on whichthe bobbin 36 can 5 frame member l2 a1; the same elevation as the member I I and carries the idle sprocket wheel 39. The idle sprocket wheel I9 is carried by the member IT. The total length of the chain 9 is sufficient to permit both of the sprocket wheels 8 and 40 to rest in their. lowermost positions simultaneously, as indicated in Figure 3.

The two hoisting sprocket wheels H? are provided on a horizontal shaft 20 journalled in the two members I! and having a hand wheel 4| or the like whereby it can be rotated and a catch or other releasable locking device whereby it can be held in various positions against rotation. A

locking device is shown and consists of a brake drum 2| mounted on the shaft 20 and cooperating with a band brake 22 one end of which is connected at 23 to one of the members I! and the other end of which is pivotally connected at 24 The platform 2.fits between rail section 3! along which the bobbin can'berolle'd. 1 The rail, sections are supported by brackets 32 secured to the plate i andhaving lugs 33 which byengagement with corresponding recesses in the underside of the platform 2, temporarily fixesthe position of the'platform and thereby'ensurescor- *r'ect registration of the platform 2 and its 'flanges -34 with the rail sections 3| and"their flanges, I so that the bobbin can be rolled without hindrance i from the rail sections onto'or over the platform.

Inop era tionywhenno bobbin'requires to herernoved and replaced, an the sprocket wheels8 Jand fill-"lie in their'lowermost positions,seeFigure '3, and therefore the platform 2 by which the sprocketwhe'els 8'are carried and the second I platform 2 by which the "sprocket wheels 40 "are carried are at rest in their lowermost position.

When the bobbin'in one cradle has become empty and'requ'iresto be removed and replaced by a full '=bobbin, the'ho'isting handle is rotated in the'requisite direction so as to cause'the two'chainsfl v to be'fnove'd by'the hoisting sprocket wheels l8. "and the loops thereof containing the snatch sprocket wheels8 of the two snatch blocks 5 :of the platform 2 und'er'the sai'd cradle to be short- "ened. The shortening of the loops acts to lift the two snatch blocks'5 and therefore the channeliron Siand the platform 2. "The direction'of the upward path of the raised platform-2 is governed by the sliding engagement of th lugs 6 of the snatch blocks 5 with 'thetwo vertical posts 1, only a'li'n'iited amount oflateral movement of -theplatform 2 being permitted by the elonga 'tion of the holes in the said lug's 6, if the said holes areelongated. Therefore the raised plat- I form 2 is guided along a path which; automati- 'cally andp'ositively ensures itsupward passage Jv'ertic'ally into a position where its hollows or depressions-2'9 engage the rims of the empty bob bin'an'd it supports the said bobbin. Afterwith- -:drawal of the spindle which supports the bobrbin mthe cradle, the hoisting sprocket wheels 18 are "allowed to rotate in the 'reverse direction by i'relea'sing the brake 2 2 sufficiently and'the'refore thesaid'loops to lengthen again and consequently the platform 2 to descend and thereby lower the empty bobbin until it can be rolled off the platform 2 onto a railsection 3|. The full bobbin is then rolled on to the platform 2 and the hoisting operation repeated. Figure 4 indicates the position of the chain when for example the sprocket wheels 8 and therefore the platform-=2-which carries them has been raised to the uppermostgposition. Due to guidance of the platform by the vertical posts I, the full bobbin is automatically and positively constrained to a vertical path whichbrings it into the cradle exactlyjbetwe'en"andflclear of the sides of the eradle, without adjustment or guidance by hand.

Thesupporting spindle is then slipped into position, and the platform 2 allowed to descend to its initial position. By rotating the hoisting shaft-inthe requisite direction the second platform Z'c'an be raised and lowered to remove and replace an empty bobbin by a full bobbin in the second cradle. The slack of the chains 9 which occurs in the hoisting of either platform can be receivedby a shelf 35 provided on each snatch block 5 below its upper surface. Figure 2"shows indot-and-dash lines, the-position of the parts when one of the platforms has been raised a portion of its upward traverse.

The depressions'or hollows 29 are not sufficiently deep to prevent a bobbin from being foreibly rolled over one platform onto a rail section 3| in its approach to another platform.

In lieu of chains, cables maybe employedin which case the snatch and idle wheels "are in the form of grooved pulleys-"and there is a pair of cables for each platform, 'two adjacent ends of each pair being anchored "as hereinbefore described, whilst the other two adjacent ends are connected to abarrel which is substituted for the hoisting sprocket wheels. The one p'airof cables runs on to the upper side of the'barrel whilst the otherpair runs on to the under side of the barrel. Therefore one pair winds' on to the barrel and the other pair winds oil? the barrel when the hoisting shaft isrota ted.

I claim:

- A bobbin hoisting means of a stranding "ma chine wherein a bobbin is hoisted into a cradle,

comprising a stationary base member att'he base of the machine, bracket'sffixed to the machine at the sides thereof, guide rods fixed at their upper ends to the brackets and at their lower ends to the said stationary base member, snatch blocks slidably mounted on the guide rods, a

cross member connected at eachend to one of l the snatch blocks, a bobbin platform mounted on the cross member and secured to the" cross member verticallybeneath the cradle, and means for lifting the snatch blocks and therefore'i the cross member and bobbin platform and thereby hoisting a bobbin into the said cradle.

JOHN HAMILTON LARMUTH. 

